spufs: use new vm_ops->access to allow local state access from gdb This uses the new vm_ops->access to allow gdb to access the SPU local store. We currently prevent access to problem state registers, this can be done later if really needed but it's safer not to. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Rik van Riel --- Index: ptrace-2.6.26-rc2-mm1/arch/powerpc/platforms/cell/spufs/file.c =================================================================== --- ptrace-2.6.26-rc2-mm1.orig/arch/powerpc/platforms/cell/spufs/file.c 2008-05-15 13:35:39.000000000 -0400 +++ ptrace-2.6.26-rc2-mm1/arch/powerpc/platforms/cell/spufs/file.c 2008-05-15 13:42:26.000000000 -0400 @@ -287,9 +287,32 @@ spufs_mem_mmap_fault(struct vm_area_stru return VM_FAULT_NOPAGE; } +static int spufs_mem_mmep_access(struct vm_area_struct *vma, + unsigned long address, + void *buf, int len, int write) +{ + struct spu_context *ctx = vma->vm_file->private_data; + unsigned long offset = address - vma->vm_start; + char *local_store; + + if (write && !(vma->vm_flags & VM_WRITE)) + return -EACCES; + if (spu_acquire(ctx)) + return -EINTR; + if ((offset + len) > vma->vm_end) + len = vma->vm_end - offset; + local_store = ctx->ops->get_ls(ctx); + if (write) + memcpy_toio(local_store + offset, buf, len); + else + memcpy_fromio(buf, local_store + offset, len); + spu_release(ctx); + return len; +} static struct vm_operations_struct spufs_mem_mmap_vmops = { .fault = spufs_mem_mmap_fault, + .access = spufs_mem_mmep_access, }; static int spufs_mem_mmap(struct file *file, struct vm_area_struct *vma) -- All Rights Reversed -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/